Ben Geertsema

Ben joined Gorove Slade in 2023 with 2 years of experience and sits in the Washington, DC office. He works on signal plans, traffic control plans, pavement marking and signing plans, and transportation/parking management plans for development projects throughout the...

Maribel Donahue

Maribel works on projects in the District and Maryland out of the Washington, DC office. She has significant transportation engineering experience, including traffic impact studies, traffic simulation, site access and circulation planning, parking demand studies,...

Katie Wagner, PE, PTOE

Katie is a Principal at Gorove Slade where she leads the Maryland office. She has significant transportation planning and engineering experience, including traffic impact studies, traffic simulation, site access and circulation planning, roadway signing and striping...

Erwin Andres, PE

Erwin has over 30 years of experience working on a wide range of traffic and transportation projects serving private sector, public sector, institutional, and federal agency clients in the metropolitan Washington, DC area. His experience has been geared to serve the...
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